Improvement in claw-bars



UNITED STATES DAVID CHRISTIE, OF OHILLIGOTHE, OHIO.

IMPROVEMENT IN CLAW-BARS.

Specification forming part of Letters Patent N 0. 117,046, dated July 18, 1871.

To all whom it may concern:

Be it known that I, DAVID Onnrs'rnz, of Chillicothe, in the county of Ross and State of Ohio, have invented certain Improvements in Claw- Bars, of which the following is a specification:

This invention relates to that class of implements which is furnished with a detachable claw; and my improvement consists in fitting the claw into the bar proper in such a manner as to relieve the connecting-bolt of any strain whatever, this result being accomplished by an ar rangement of jogs and shoulders, which will be hereafter fully described.

The accompanying drawing is a perspective view of a claw-bar embodying my improvement.

A represents the bar proper, having the customary heel or fulcrum B and a bolt, 0, with which the detachable claw D is secured to said bar. The claw is provided with two jaws, d d, and is fitted in the bar in the following manner:

The bar is furnished with a recess, having two flat faces, E c, a jog, F, and an under-cut, G, into which fit the corresponding surfaces H h, shoulder I, and incline J of the claw. The claw is forced into the bar from either side, and as soon as the bolt 0 is inserted the two members A D are securely united together.

The prominent feature of my invention consists' in the arrangement of jog F and shoulder I, which are located in such a manner as to sustain the entire strain which is brought to bear upon the claw D when the latter is employed in drawing spikes, Ste. As these devices F and I receive the entire stress of the implement the bolt 0 is relieved of any strain whatever, which will be found a great advantage, as it frequently happens that in ordinary bars having detachable claws the bolt becomes so bent by the severe duty imposed upon. it as to prevent it being removed from the bar proper until said bolt has been straightened, which is no easy matter, es pecially if the laborers are not provided with the proper tools, which is generally the case. The trackmen can be furnished with a number of claws, and in case one should break a new one can be applied in a few minutes by the laborers themselves without calling in the assist ance of a blacksmith or other artisan. The claws can be made of steel and the bar proper of wrought-iron. V

I am aware that claw-bars have before been made with a detachable claw, fitting at its upper end in a dovetailed recess in the bar and secured by a bolt. This, therefore, I do not claim; but a great advantage results from combining, with the above-named means of securing and supporting the claw, the shoulder I, by which the entire endwise strain is sustained, so that the bolt is effectually relieved of the strain endwise of the bar by this shoulder at the same time that it is re lieved of pressure endwise to itself by the undercut or dovetail G.

I claim as my invention- The combination of the detachable claw D, provided with the shoulder I and incline J, with the bar A formed to receive it, substantially as and for the purposes set forth.

In testimony of which invention I hereunto set my hand.

DAVID CHRISTIE.

WVitnesses:

GEO. H. KNIGHT, J AMES H. LAYMAN. 

